Question

Design a Butterworth Sallen-Key Low Pass Filter with the critical frequency, fc = 7.23 kHz. For...

Design a Butterworth Sallen-Key Low Pass Filter with the critical frequency, fc = 7.23 kHz. For design simplification in RC network, assume equal value for capacitor, C = 22nF while R has a ratio, m = 2. Use the quality factor, Q value from the Table .

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Answer #1

Given:

Sallen-Key is an active filter, with Butter worth configuration and in second order following rules applies, please refer to the given diagram:

Where A0 is a open loop gain.

the Quality factor table is not given, but selectivity can be found from

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